After employing steady-state endurance training for 6-months, in preparation for marathon, which of the following physiological parameters would be significantly increased in the skeletal muscles of the legs at rest?   a. Mitochondrial density   b. CK enzyme activity   c. Glycogen storage   d. CPT activity   e. All of the above    f. Only A, C and D are correct

Q: Generation of Force 2 During concentric contractions, increasing the speed of contraction will a.…

A: Contraction of muscles occurs when the sliding of the thin actin filament into the thick myosin…

Q: 38. Which of the following (are) is true when 50% of the motor units are stimulated?   A. the…

A: A motor unit is composed of a Motor neuron and the skeletal muscle fibers supplied (innervated) by…

Q: Muscular endurance could be assessed by a. running on a treadmill b. 1RM c. number of repetitions…

A: Muscle contains muscle fiber cells which are specialized for contraction. The major constituents…

Q: Why might multiple, small motor units be advantageous over a single large motor unit?   A. They…

A: Motor units participate in regulation of movement of muscle fibers.

Q: Which of the following statements about movement and locomotion isfalse?a. Terrestrial animals and…

A: The process called movement is the temporary or permanent displacement of the part of the body of a…

Q: Exercise intensity can be estimated using O a. perceived exertion (RPE) O b. heart rate O c. talk…

A: A state of "physical fitness" can be defined as a condition of well-being. Bodily health is a…

Q: Anaerobic exercise is A. Strength Training B. Cardiovascular Training C. Distance Running

A: Cellular respiration involves breakdown of glucose and production of energy (ATP) either in the…

Q: If oxygen supplies are depleted during exercise, the body will use anaerobic respiration to produce…

A: Respiration is the process of the intake of oxygen (O2) from the external surroundings to the tissue…

Q: To demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm…

A: Ans - the correct answer for the above question is- A) Different motor units were contracting while…

Q: 18) Which of the following statements concerning types of muscle fibre are correct? 1. Three types…

A: Introduction Muscle Fibres:- A muscle fiber is a single cell made of a bundle of myofibrils,…

Q: Muscular atrophy occurs when: A. A patient lacks the coordination needed to walk normally. B. Muscle…

A: Muscular atrophy refers to the loss of skeletal muscle. The atrophied muscle normally smaller and…

Q: Muscles generate heat. Which muscle type is responsible for generating most of the heat in the body?…

A: "Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: For a sedentary individual, after 9-months of endurance training, the lactate threshold (LT) shifts…

A: The correct words for the fill ups would be :  For a sedentary individual, after 9-months of…

Q: Which of the following is a valid statement about lactate?

A: The correct answer is identified as option g. Both A and B are true.

Q: Which of the following is NOT a stock form of the key molecules for energy generation in muscle? A.…

A: Adenosine triphosphate (ATP) is used to generate energy in muscles. A significant amount of ATP is…

Q: Explain how muscles obtain energy for contraction (esp. in absence of O2). Be sure to discuss the 4…

A: The source of energy used to stimulate the movement of the working muscle is adenosine triphosphate…

Q: Which of the following would contribute to “glycogen sparing/preservation” during prolonged…

A: Introduction Animals, fungi, and bacteria all use the multibranched polysaccharide of glucose known…

Q: The intrafusal fibers OA. are of two types, fast twitch and slow twitch. OB. increase in number with…

A: Muscle is a specialized tissue of mesodermal origin. About 40-50% of the bodyweight of a human adult…

Q: The firmness of rigor mortis ___.     A. can be reduced by manipulation of the affected muscles and…

A: Normally the muscles of the body remain in the contracted state until ATP binds to myosin, releasing…

Q: Individual motor units can vary based on which of the following? (SELECT ALL THAT APPLY) a.) The…

A: Motor units It consists of a motor neuron and every skeletal muscle fiber that the neuron's axon…

Q: Bob is a 19-year old male, who is 6’3”, and weights 160lbs. You tested Bob’s 1.5-mile run time, and…

A: Absolute VO2 max is without a doubt the amount of oxygen you breathe in liters in line with a…

Q: Creatine phosphate in muscle cells   a is utilized during the excess post-exercise oxygen…

A: Creatine phosphate is the high-energy, phosphate-storage molecule of muscle. They are mostly found…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.